/*-------------------------------------------------------------------------
 *
 * regis.h
 *
 * Declarations for fast regex subset, used by ISpell
 *
 * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
 *
 * src/include/tsearch/dicts/regis.h
 *
 *-------------------------------------------------------------------------
 */

#ifndef __REGIS_H__
#define __REGIS_H__

typedef struct RegisNode
{
    uint32
                type:2,
                len:16,
                unused:14;
    struct RegisNode *next;
    unsigned char data[FLEXIBLE_ARRAY_MEMBER];
} RegisNode;

#define  RNHDRSZ    (offsetof(RegisNode,data))

#define RSF_ONEOF    1
#define RSF_NONEOF    2

typedef struct Regis
{
    RegisNode  *node;
    uint32
                issuffix:1,
                nchar:16,
                unused:15;
} Regis;

bool        RS_isRegis(const char *str);

void        RS_compile(Regis *r, bool issuffix, const char *str);
void        RS_free(Regis *r);

/*returns true if matches */
bool        RS_execute(Regis *r, char *str);

#endif
